CN102386954A - Data transmission method, access point equipment and terminal - Google Patents
Data transmission method, access point equipment and terminal Download PDFInfo
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- CN102386954A CN102386954A CN2010102737071A CN201010273707A CN102386954A CN 102386954 A CN102386954 A CN 102386954A CN 2010102737071 A CN2010102737071 A CN 2010102737071A CN 201010273707 A CN201010273707 A CN 201010273707A CN 102386954 A CN102386954 A CN 102386954A
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Abstract
The invention provides a data transmission method, access point equipment and a terminal. The method comprises the following steps: dividing the transmission period of a channel into a descending transmission stage and an ascending transmission stage corresponding to terminal time division capability; in the ascending transmission stage, receiving ascending data according to the terminal time division capability corresponding to the ascending transmission stage; in the descending transmission stage, adjusting the wave beam of a smart antenna; and directionally sending descending data. The access point equipment provided by the invention comprises an ascending and descending stage division module, an ascending receiving and processing module and a descending sending and processing module. The terminal provided by the invention comprises an ascending sending and processing module and a descending receiving and processing module.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to data transmission method, access point apparatus and terminal.
Background technology
At traditional WLAN (Wireless LAN; Hereinafter to be referred as " WLAN ") in the technology; The terminal (Station, STA) (Access Point AP) supports the omnidirectional antenna technology with access point; Adopt omnidirectional antenna to carry out the transmission of data, therefore caused WLAN signal penetration capacity strong, exist in dead angle, the wlan system and problem such as inter-system interference is bigger.In order to overcome these problems, intelligent antenna technology is introduced in the wlan system, and STA and AP support intelligent antenna technology, adopts smart antenna to carry out the transmission of data.
Smart antenna in the wlan system adopts the switched beam antenna technology, in coverage, produces a plurality of different narrow beams that point to, and when sending data, selects a beam direction (oriented approach) of smart antenna to send usually.
At present; The process that STA and AP adopt smart antenna to carry out transfer of data mainly comprises: STA or AP adopt to keep out of the way and intercept machine-processed competitive channel, promptly when having data to send demand; At first smart antenna is adjusted to a fixing orientation direction according to the upper strata statistical information; Intercept channel with oriented approach, after confirming there is not the miscellaneous equipment busy channel, keep out of the way a frame with this oriented approach again; If it is occupied that channel does not still have, then send data with this orientation direction.
In realizing process of the present invention, the inventor finds to exist at least in the prior art side among following problem: STA and the AP, such as AP when having data transmission demand to need competitive channel; Must smart antenna be switched to an orientation direction; Intercept channel and keep out of the way with oriented approach, and in the process of intercepting channel and keeping out of the way, the opposing party among STA and the AP sends data to AP possibly such as STA on other directions of smart antenna; Because this moment, the smart antenna of AP was an orientation direction; Therefore, AP can't receive the data that STA sends through other directions of smart antenna, thereby causes loss of data.
Summary of the invention
The embodiment of the invention provides data transmission method, access point apparatus and terminal, can guarantee the reception of data.
A kind of data transmission method that the embodiment of the invention provides comprises:
The transmission cycle of channel is divided into the uplink stage of downlink transfer stage and counterpart terminal time-division ability;
In the said uplink stage, according to the time-division ability reception upstream data at corresponding terminal of said uplink stage;
In the said downlink transfer stage, smart antenna is carried out wave beam adjustment, directive sending downlink data.
The another kind of data transmission method that the embodiment of the invention provides comprises:
In the uplink assignment stage of using, smart antenna is carried out wave beam adjustment, directive sending upstream data at the terminal of the support time-division that marks off;
At the downlink transfer stage that marks off, downlink data receiving.
The access point apparatus that the embodiment of the invention provides comprises smart antenna, also comprises:
The up-downgoing stage is divided module, is used for the transmission cycle of channel is divided into the uplink stage of downlink transfer stage and counterpart terminal time-division ability;
Up receiving processing module was used in the uplink stage, and the terminal time-division ability corresponding according to the uplink stage receives upstream data;
Descending transmission processing module was used in the downlink transfer stage, and smart antenna is carried out wave beam adjustment, directive sending downlink data.
The time-division is supported at the terminal that the embodiment of the invention provides, and this terminal comprises:
Up transmission processing module is used in the uplink assignment stage of the terminal of the support time-division that marks off use smart antenna being carried out wave beam adjustment, directive sending upstream data;
Descending receiving processing module is used at the downlink transfer stage that marks off, downlink data receiving.
The data transmission method of the embodiment of the invention, access point apparatus and terminal; For the transmitting uplink data at terminal is distributed the special-purpose uplink stage; For the downlink data transmission of access point is distributed the special-purpose downlink transfer stage; So just confirmed the timesharing transmitting time of up-downgoing data in advance, a side who has avoided terminal and access point is when needs send orientation direction of The data smart antenna, and the opposing party sends data through other directions of smart antenna at one time; Cause the problem of loss of data, thereby guaranteed the reception of data.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the basic flow sheet that the embodiment of the invention is directed against the transfer of data of AP proposition;
Fig. 2 is the basic flow sheet that the embodiment of the invention is directed against the transfer of data of STA proposition;
Fig. 3 is the flow chart of transfer of data in the embodiment of the invention one;
Fig. 4 is the sketch map of the transmission cycle of division in the embodiment of the invention one;
Fig. 5 is the flow chart of transfer of data in the embodiment of the invention two;
Fig. 6 is the sketch map of the transmission cycle of division in the embodiment of the invention two;
Fig. 7 is the flow chart of transfer of data in the embodiment of the invention three;
Fig. 8 is the sketch map of the transmission cycle of division in the embodiment of the invention three;
Fig. 9 is the basic structure sketch map of AP in the embodiment of the invention;
Figure 10 is the basic structure sketch map of STA in the embodiment of the invention.
Embodiment
Because STA and AP adopt the mode of competitive channel to carry out the transmission of data in the prior art; The transmission of each time slot or reception are not predetermined, that is to say a side does not know when the opposing party can send data; Like this; A side just occurred and on an orientation direction of smart antenna, intercepted channel when keeping out of the way, the opposing party sends data conditions in other directions of smart antenna, thereby causes loss of data.It is thus clear that, if guarantee the reception of data, just need to confirm in advance the timesharing transmitting time of uplink and downlink data, avoid side the opposing party when needs send the The data oriented approach on other directions, to send data.Consider that again in the business of reality, STA can support time division way, also can not support time division way, therefore, when adopting the timesharing of uplink and downlink data to send, also need confirm concrete data transmission method to the time-division ability of STA.Wherein, the up STA of being meant sends data to AP, and AP receives data; The descending AP of being meant sends data to STA, and STA receives data.
Therefore, the embodiment of the invention has proposed a kind of data transmission method to wlan network.Referring to Fig. 1, the processing on AP equipment comprises:
Step 101: the uplink stage that the transmission cycle of channel is divided into downlink transfer stage and counterpart terminal time-division ability.
Step 102: in the uplink stage, the terminal time-division ability corresponding according to the uplink stage receives upstream data.
Step 103:, smart antenna is carried out wave beam adjustment, directive sending downlink data in the downlink transfer stage.
Intelligent antenna beam adjustment in the present embodiment can realize through using upper layer information.
Above-mentioned data transmission method shown in Figure 1; Owing to,, so just confirmed the timesharing transmitting time of up-downgoing data in advance for the downlink data transmission of AP has been distributed the special-purpose downlink transfer stage for the transmitting uplink data of STA has been distributed the special-purpose uplink stage; AP receives only data in the uplink stage; Therefore only send data in stage in downlink transfer, avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna, the opposing party sends data through other directions of smart antenna at one time; Cause the problem of loss of data, thereby guaranteed Data Receiving.
In addition, the embodiment of the invention supports the STA of time-division to propose a kind of method of utilizing smart antenna to carry out transfer of data to user side.Referring to Fig. 2, this method mainly comprises:
Step 201: in the uplink assignment stage of using, smart antenna is carried out wave beam adjustment, directive sending upstream data at the terminal of the support time-division that marks off.
Step 202: at the downlink transfer stage that marks off, downlink data receiving.
Above-mentioned data transmission method shown in Figure 2; Confirmed the timesharing transmit stage of up-downgoing data in advance, STA only sends data in the uplink stage, receive only data in downlink transfer in the stage; Therefore avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna; The opposing party sends data through other directions of smart antenna at one time, causes the problem of loss of data, thereby has guaranteed Data Receiving.
Support the time-division and do not support the time-division because the time-division ability of STA comprises therefore, whether support the time-division, can obtain following three kinds of business scenarios according to the STA that inserts AP:
Business scenario one, support the STA of time-division and do not support the STA of time-division all to be linked into AP;
Business scenario two, have only and do not support the STA of time-division to be linked into AP;
Business scenario three, have only and support the STA of time-division to be linked into AP.
In concrete business realizing process, the embodiment of the invention can provide detailed AP and STA to utilize smart antenna to carry out the technical scheme of transfer of data respectively to above-mentioned three kinds of business scenarios respectively.Then lifting concrete embodiment respectively to above-mentioned three kinds of business scenarios below describes.
Embodiment one:
This embodiment one corresponding business scenario one is supported the STA of time-division and is not supported the STA of time-division all to be linked into AP.For ease of understanding, the process of utilizing smart antenna to carry out transfer of data respectively AP and STA is placed in the same flow process to be described.
Referring to Fig. 3, the process that AP and STA utilize smart antenna to carry out transfer of data in the embodiment of the invention one can comprise the steps:
Step 301:STA and AP carry out the time-division capability negotiation, and AP confirms to support the STA of time-division and do not support the STA of time-division all to insert this AP.
The time-division capability negotiation can be through surveying at the terminal or during association request; Carry time-division capabilities bits notice AP oneself and whether support the time-division transfer function; Simultaneously AP also carries the time-division capabilities bits in the beacon frame of probe response and broadcasting or associated response, thus the completion negotiations process.
Step 302:AP periodically divides the transmission cycle of channel, marks off the uplink stage of downlink transfer stage and counterpart terminal time-division ability, and this uplink stage comprises uplink assignment stage and competitive stage.
In the present embodiment one; Owing to insert STA that having of AP support the time-division and the STA that does not support the time-division; Therefore, need in the uplink stage, mark off the transmit stage of the STA use of supporting the time-division respectively, be called the uplink assignment stage; And the transmit stage of not supporting the STA use of time-division, be called the competitive stage.Like this, in fact transmission cycle is divided into uplink assignment stage Tup, competitive stage Tc and downlink transfer stage Tdw.
In addition,, need notify each STA concrete data timesharing transmission plan, therefore, in transmission cycle, can further include broadcasting stage A nn owing to support the STA of time-division to carry out transfer of data through the mode of timesharing.In such cases, the time slot of transmission cycle division form can be referring to Fig. 4.
Step 303:AP confirms each time slot and the corresponding relation of each STA among uplink assignment stage Tup and the downlink transfer stage Tdw.
At uplink assignment stage Tup and downlink transfer stage Tdw, the data of each STA are that timesharing is sent and received, therefore, and the corresponding relation of each time slot and each STA among definite uplink assignment stage Tup of needs and the downlink transfer stage Tdw.Specifically can confirm according to the upper strata statistical information; Such as a kind of definite method be: AP according to the downlink service data of the uplink service demand of the STA of support time-division of receiving, buffer memory, do not support the transmission rate of each STA of number of services of the STA of time-division to carry out the time slot allocation of the corresponding STA of differentiated service; Be constrained to; Delay variation demand and minimum bandwidth requirement according to business calculate each service needed maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send; Thereby confirm the minimum slot length that each service needed is scheduled for, under the prerequisite of constraint, the STA that is preferably high-priority service distributes time slot corresponding more than satisfying; Be preferably two-forty STA for the same type business and distribute time slot corresponding, make that the throughput of system is maximum.
Step 304: at the broadcasting stage A nn of a transmission cycle, AP is through broadcast frame notification transmission cycle results, and the corresponding relation of each time slot and each STA.
Each STA is through receiving the information that broadcast frame has then obtained the uplink stage of downlink transfer stage and counterpart terminal time-division ability.
Further; For the STA that guarantees not support the time-division not at uplink assignment stage competitive channel; The concurrent line data of serving of competitive channel in the competitive stage only, in this step, AP can also with broadcast frame medium access control (MAC) head the duration (duration) territory value be changed to the corresponding duration of uplink assignment stage Tup; Like this can be so that after not supporting that the STA of time-division receives this broadcast frame; Modification territory (NAV) value of mourning in silence, the duration in the uplink assignment of mourning in silence stage, thereby not at uplink assignment stage competitive channel.
Step 305: at the uplink assignment stage of transmission cycle Tup, support the STA of time-division that smart antenna is carried out the wave beam adjustment, give AP with the orientation direction transmission upstream data of smart antenna in this STA time slot corresponding.
Need to prove; If in step 304; AP is changed to the corresponding duration of Tup with the value in " duration " territory of broadcast frame MAC head; So, the STA that receives the support time-division of this broadcast frame also may revise the NAV value of oneself according to " duration " thresholding, causes and supports the terminal of time-division to mourn in silence in the Tup stage.In order further to avoid this kind situation to take place; In this step 305; When AP began at each time slot in uplink assignment stage, sending mourns in silence removed the STA that the support time-division of this time slot correspondence is given in indication, guaranteed that the STA of this support time-division can send upstream data at the corresponding time slot in uplink assignment stage; Mourning in silence and remove indication can be a control frame or a Frame, for example CF-END frame.
Step 306: in the uplink assignment stage; AP supports the corresponding relation of the STA of time-division according to each time slot and each; To this each time slot smart antenna is carried out wave beam adjustment, receive the upstream data at the corresponding terminal of this time slot respectively at uplink assignment each time slot in the stage with the orientation direction of smart antenna.
Certainly, the process of this step also can replace with: in the uplink assignment stage, AP also can not consider the corresponding relation of time slot and STA, and receives upstream data with omnidirectional's direction of smart antenna.
Step 307:, do not support the STA of time-division to send upstream data with the mode of competitive channel in the competitive stage.
Further, because the time slot in uplink assignment stage and length thereof are predetermined according to the flow that reports before the STA that supports the time-division.Therefore; The STA that supports the time-division is when having new business; Can't send through the uplink assignment stage in this transmission cycle, learn this new business, reserve time slot corresponding in the uplink assignment stage of next transmission cycle in order to guarantee AP; Can by the STA that supports the time-division in the competitive stage of current transmission cycle, send the first packet that carries the new business transmission demand through the competitive channel mode and give AP.
Further; Because the timely transmission demand of management frames and broadcast frame/multicast frame, and the time slot of downlink transfer in the stage correspondence distribute to each STA, therefore; In the competitive stage, AP also can use the mode of competitive channel to send management frames and/or broadcast frame/multicast frame.
Step 308: in the competitive stage, AP receives upstream data with omnidirectional's direction of smart antenna.
Do not have the sequencing in the fixing execution between above-mentioned steps 307 and the step 308.
In the competitive stage, AP can be according to the busy not busy degree of channel, and whether decision finishes stage competitive stage in advance.
Step 309: in the downlink transfer stage; AP is according to each time slot and the corresponding relation of each STA of downlink transfer in the stage; To this each time slot smart antenna is carried out wave beam adjustment respectively, send downlink data to each STA respectively with orientation direction each time slot of smart antenna in the downlink transfer stage.
Further; In order to guarantee not support the STA of time-division not send upstream data at downlink transfer stage competitive channel, and the concurrent line data of serving of competitive channel in the competitive stage only, in this step; AP can also be when the downlink transfer stage begins; Omnidirectional's mode with smart antenna is sent the indication of mourning in silence, and the value in the duration territory of this indication MAC head of mourning in silence is changed to corresponding duration of downlink transfer stage, like this can be so that after not supporting that the STA of time-division receives this indication of mourning in silence; Revise the NAV value, the duration in the downlink transfer of mourning in silence stage.The indication of mourning in silence can be a control frame, and for example CTS-to-self also can be a Frame.
AP also can finish the downlink transfer stage according to the transmission situation of downlink data packet in advance in the downlink transfer stage, gets into next transmission cycle.
In force, AP can adjust the length in each stage that marks off in the said transmission cycle according to the occupancy of channel in each stage that marks off or the time of data transmit-receive completion in said transmission cycle.
Step 310: in the downlink transfer stage, each STA carries out the wave beam adjustment to smart antenna, at the orientation direction downlink data receiving of time slot corresponding with smart antenna.
Certainly, the process of this step also can replace with: in the downlink transfer stage, each STA also can not consider the corresponding relation of time slot and STA, and with omnidirectional's direction downlink data receiving of smart antenna.
In the data transmission method of the embodiment of the invention one; Because for the STA that supports the time-division has distributed the special-purpose uplink assignment stage; For the STA that does not support the time-division has distributed the special-purpose competitive stage,, so just confirmed the timesharing transmitting time of up-downgoing data in advance for AP has distributed the special-purpose downlink transfer stage; Support the STA of time-division and do not support the STA of time-division in uplink assignment stage and competitive stage, only to send data respectively; All receive only data in stage in downlink transfer, AP receives only data in uplink assignment stage and competitive stage, only sends data in the stage in downlink transfer; Therefore avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna; The opposing party sends data through other directions of smart antenna at one time, causes the problem of loss of data, thereby has guaranteed Data Receiving.
Embodiment two:
These embodiment two corresponding business scenarios two have only and do not support the STA of time-division to be linked into AP.For ease of understanding, the process of utilizing smart antenna to carry out transfer of data respectively AP and STA is placed in the same flow process to be described.
Referring to Fig. 5, the process that AP and STA utilize smart antenna to carry out transfer of data in the embodiment of the invention two can comprise the steps:
Step 501:STA and AP carry out the time-division capability negotiation, and AP confirms to have only the STA that does not support the time-division all to insert this AP.
Step 502:AP periodically divides the transmission cycle of channel, marks off the uplink stage of downlink transfer stage and counterpart terminal time-division ability, and this uplink stage is actual to be the competitive stage of not supporting the STA use of time-division.
In the present embodiment two,, therefore, only need the uplink stage be got final product as the competitive stage that the STA that does not support the time-division uses owing to have only the STA that does not support the time-division to insert.Like this, in fact transmission cycle is divided into competitive stage Tc and downlink transfer stage Tdw.At this moment, the time slot of transmission cycle division form can be referring to Fig. 6.
Step 503:AP confirms each time slot and the corresponding relation of each STA among the downlink transfer stage Tdw.
Step 504:, do not support the STA of time-division to send upstream data with the mode of competitive channel in the competitive stage of a transmission cycle.
Further, in the competitive stage, AP also can use the mode of competitive channel to send management frames.
All of step 505～step 507 and step 308～310 are described identical.
In the data transmission method of the embodiment of the invention two; Owing to,, so just confirmed the timesharing transmitting time of up-downgoing data in advance for AP has distributed the special-purpose downlink transfer stage for not support the STA of time-division to distribute the special-purpose competitive stage; Do not support the STA of time-division in the competitive stage, only to send data; Receive only data in downlink transfer in stage, AP receives only data in the competitive stage, only sends data in the stage in downlink transfer; Therefore avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna; The opposing party sends data through other directions of smart antenna at one time, causes the problem of loss of data, thereby has guaranteed Data Receiving.
Embodiment three:
These embodiment three corresponding business scenarios three have only and support the STA of time-division to be linked into AP.For ease of understanding, the process of utilizing smart antenna to carry out transfer of data respectively AP and STA is placed in the same flow process to be described.
Referring to Fig. 7, the process that AP and STA utilize smart antenna to carry out transfer of data in the embodiment of the invention three can comprise the steps:
Step 701:STA and AP carry out the time-division capability negotiation, and AP confirms to have only the STA of support time-division all to insert this AP.
Step 702:AP periodically divides the transmission cycle of channel, marks off the uplink stage of the time-division ability of downlink transfer stage and counterpart terminal, and this uplink stage is actual to be the uplink assignment stage of supporting the STA use of time-division.
In the present embodiment three, owing to have only the STA that supports the time-division to insert, like this, in fact current transmission cycle is divided into uplink assignment stage Tup and downlink transfer stage Tdw.In transmission cycle, can further include broadcasting stage A nn.At this moment, the time slot of transmission cycle is divided form referring to Fig. 8.
Further, in the present embodiment, STA also can send the first packet of new business with the mode of competitive channel to AP in each transmission cycle.
Step 703～706 are identical with the description of step 303～step 306; Just; Owing to there is not to insert the STA that does not support the time-division; Therefore, need to remove in the description of step 303～step 306 about AP further with the value in " duration " territory of broadcast frame MAC head be changed to the corresponding duration of Tup, the STA that do not support the time-division mourns in silence and AP sends to mourn in silence when each time slot in uplink assignment stage begins and removes the associated description of indicating in the uplink assignment stage.
Step 707～step 708 is identical with the description of step 309～step 310; Just; Owing to there is not to insert the STA that does not support the time-division, therefore, AP is when the downlink transfer stage begins in the needs removal step 310; Omnidirectional's mode with smart antenna is sent the indication of mourning in silence, and the value in the duration territory of the indication MAC head of mourning in silence is changed to the associated description of corresponding duration of downlink transfer stage.
In the data transmission method of the embodiment of the invention three; Owing to,, so just confirmed the timesharing transmitting time of up-downgoing data in advance for AP has distributed the special-purpose downlink transfer stage for the STA that supports the time-division has distributed the special-purpose uplink assignment stage; Support the STA of time-division only to send data in the stage in uplink assignment; Receive only data in downlink transfer in stage, AP receives only data in uplink assignment in the stage, only sends data in the stage in downlink transfer; Therefore avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna; The opposing party sends data through other directions of smart antenna at one time, causes the problem of loss of data, thereby has guaranteed Data Receiving.
Need to prove; In three embodiment of the invention described above; When STA and AP transmit and receive data at the orientation direction with smart antenna; The orientation direction of this smart antenna and rate corresponding are according to receiving signal strength signal intensity indication (RSSI), and packet loss upper strata statistical informations such as (PER) is carried out the selection of package level.A kind of orientation direction of feasible selection smart antenna and the process of rate corresponding comprise:
At first, obtain to each Correspondent Node (such as, when AP need select the direction of smart antenna; Correspondent Node is STA; When STA need select the direction of smart antenna, Correspondent Node was AP) the beam direction of each smart antenna corresponding validated user speed under different rates, this process of obtaining can comprise the steps: to write down the corresponding reception signal strength signal intensity indication (RSSI) of antenna; The beam direction of any several antennas being formed smart antenna according to the RSSI value; Such as, can any a plurality of antennas be formed the beam direction of smart antenna according to RSSI value order from big to small; To each Correspondent Node; On the beam direction of the smart antenna of forming, sending packet respectively according to different speed surveys; Obtain the statistical information of the beam direction of this smart antenna under each speed, comprise packet loss and validated user speed etc.; Wherein, validated user speed=speed * (1-packet loss); To the beam direction of each smart antenna of each Correspondent Node, the beam direction that writes down this smart antenna corresponding validated user speed under different rates;
Secondly, when sending to this Correspondent Node or receiving each packet, select the beam direction and the speed of the corresponding smart antenna of maximum validated user speed.
Like this, through said process, AP can confirm that then it is directed against the orientation direction of the smart antenna that each STA should select respectively, and STA can confirm that also it is directed against the orientation direction of the smart antenna that AP should select.
In addition, in three embodiment of the invention described above, in each transmission cycle, can be according to the occupancy of channel in each stage that marks off or the foundations such as time of data transmit-receive completion, self adaptation is adjusted the length in each stage that marks off in the said transmission cycle.Such as, if AP finds that channel ratio is not busy in the competitive stage, then can finish the competitive stage in advance; For another example, in the downlink transfer stage,, also the downlink transfer stage can be finished in advance if AP has sent data in advance.
And; In above-mentioned three embodiment of the invention described above; In the uplink that each transmission cycle is divided into downlink transfer stage and counterpart terminal time-division ability during the stage; A kind of implementation can for: calculate each service needed maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send according to the delay variation demand of business and minimum bandwidth requirement; According to said each service needed that calculates maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send, the transmission cycle of said channel is divided into uplink assignment stage and competitive stage in uplink stage of downlink transfer stage and counterpart terminal time-division ability.
The embodiment of the invention has also proposed a kind of AP, and this AP is in order to implement above-mentioned method, and this AP comprises smart antenna, and referring to Fig. 9, this AP also comprises:
The up-downgoing stage is divided module 901, is used for the transmission cycle of channel is divided into the uplink stage of downlink transfer stage and counterpart terminal time-division ability;
Up receiving processing module 902 was used in the uplink stage, and the terminal time-division ability corresponding according to the uplink stage receives upstream data;
Descending transmission processing module 903 was used in the downlink transfer stage, and smart antenna is carried out wave beam adjustment, directive sending downlink data.
In one embodiment of the invention; The up-downgoing stage is divided the uplink assignment stage that module 901 also is used for marking off in the said uplink stage terminal use of supporting the time-division; Then said up receiving processing module 902 is in said uplink assignment in the stage; Said smart antenna is carried out the wave beam adjustment, so that said smart antenna receives upstream data with orientation direction.
In one embodiment of the invention; The up-downgoing stage is divided the competitive stage that module 901 also is used for marking off in the said uplink stage terminal use of not supporting the time-division; Then said up receiving processing module 902 makes said smart antenna receive upstream data with omnidirectional's direction in the said competitive stage.
In one embodiment of the invention; If comprise the competitive stage of the terminal use of not supporting the time-division in the uplink stage that up-downgoing stage division module 901 marks off; Descending transmission processing module 903 is further used for sending one or more arbitrarily in management frames, broadcast frame and the multicast frame in the competitive stage with the mode of competitive channel.
In one embodiment of the invention, the said up-downgoing stage divides module 901 and is marking off said uplink assignment during the stage, also is used for marking off the broadcasting stage at transmission cycle;
Descending transmission processing module 903 also was used in the broadcasting stage, carried uplink assignment stage and downlink transfer each time slot and the corresponding relation at each terminal in the stage through broadcast frame;
Said up receiving processing module 902 also is used for according to said corresponding relation each time slot in the said downlink transfer stage said smart antenna being carried out the wave beam adjustment respectively with said descending transmission processing module 903;
Said up receiving processing module 902 also is used for according to said corresponding relation each time slot in the said uplink assignment stage said smart antenna being carried out the wave beam adjustment.
In one embodiment of the invention; The up-downgoing stage divides module 901 and also is used for calculating each service needed maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send according to the delay variation demand and the minimum bandwidth requirement of business; According to said each service needed that calculates maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send, the transmission cycle of said channel is divided into the said uplink stage of said downlink transfer stage and counterpart terminal time-division ability.
In one embodiment of the invention; Said up receiving processing module 902 also is used for respectively said smart antenna being carried out the wave beam adjustment with said descending transmission processing module 903; Comprise the reception signal strength signal intensity indication that the record antenna is corresponding, any several antennas are formed the beam direction of said smart antenna according to said signal strength indication value; Through on the beam direction of said smart antenna, sending the packet of detection respectively with different speed, the beam direction that obtains said smart antenna corresponding validated user speed under different rates; The beam direction of said smart antenna is adjusted into the corresponding beam direction of maximum validated user speed.
In a preferred embodiment of the invention, AP also comprises:
Cycle Length adjusting module 904 is used at said transmission cycle, according to the time that the occupancy or the data transmit-receive of channel in each stage that marks off are accomplished, adjusts the length in each stage that marks off in the said transmission cycle.
The AP that the embodiment of the invention provides is that STA has distributed the special-purpose uplink stage; For AP has distributed the special-purpose downlink transfer stage; So just confirmed the timesharing transmitting time of up-downgoing data in advance, AP receives only data in the uplink stage, only send data in the stage in downlink transfer; Therefore avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna; The opposing party sends data through other directions of smart antenna at one time, causes the problem of loss of data, thereby has guaranteed Data Receiving.
The embodiment of the invention has also proposed a kind of STA, and this STA is in order to implement said method, and referring to Figure 10, this STA comprises:
Up transmission processing module 1001 is used in the uplink assignment stage of the terminal of the support time-division that marks off use smart antenna being carried out wave beam adjustment, directive sending upstream data;
Descending receiving processing module 1002 is used for the downlink transfer stage downlink data receiving that is marking off.
In one embodiment of the invention; Said up transmission processing module 1001; According to each time slot and the corresponding relation at each terminal of the uplink assignment of obtaining in the stage; Confirm the corresponding up sending time slots in terminal of this support time-division, smart antenna is carried out the wave beam adjustment, send upstream data at this up sending time slots with the orientation direction of smart antenna.
In one embodiment of the invention, said up transmission processing module 1001, is sent the first packet that carries the new business transmission demand at the competitive stage of further using at the terminal of not supporting the time-division with the mode of competitive channel.
The STA that the embodiment of the invention provides has confirmed the timesharing transmit stage of up-downgoing data in advance; STA only sends data in the uplink stage; Therefore receive only data in downlink transfer in stage, avoided a side among STA and the AP when orientation direction of needs transmission The data smart antenna, the opposing party sends data through other directions of smart antenna at one time; Cause the problem of loss of data, thereby guaranteed Data Receiving.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Claims (22)
1. a data transmission method is characterized in that, comprising:
The transmission cycle of channel is divided into the uplink stage of downlink transfer stage and counterpart terminal time-division ability;
In the said uplink stage, the terminal time-division ability corresponding according to the said uplink stage receives upstream data;
In the said downlink transfer stage, smart antenna is carried out wave beam adjustment, directive sending downlink data.
2. data transmission method according to claim 1 is characterized in that,
The uplink stage of said counterpart terminal time-division ability also comprises: support in competitive stage of terminal uplink assignment stage of using and the terminal use of not supporting the time-division of time-division any one or two.
3. data transmission method according to claim 2 is characterized in that, in the said uplink assignment stage, said terminal time-division ability according to said uplink stage correspondence receives upstream data and comprises:
In the said uplink assignment stage, smart antenna is carried out the wave beam adjustment, with the orientation direction reception upstream data of smart antenna; Or
In the said competitive stage, with omnidirectional's direction reception upstream data of smart antenna.
4. data transmission method according to claim 2; It is characterized in that; In the said uplink assignment stage, also comprise: in said transmission cycle, mark off the broadcasting stage, in the said broadcasting stage; Carry said uplink assignment stage and said downlink transfer each time slot and the corresponding relation at each terminal in the stage through broadcast frame, at each time slot smart antenna is carried out the wave beam adjustment according to said corresponding relation.
5. data transmission method according to claim 4 is characterized in that, this method also comprises:
With said broadcast frame the duration territory value be changed to corresponding duration of said uplink assignment stage, when each time slot in said uplink assignment stage began, sending mourns in silence removed indication and gives this time slot terminal of corresponding support time-division.
6. data transmission method according to claim 4; It is characterized in that; The uplink stage that said transmission cycle with channel is divided into downlink transfer stage and counterpart terminal time-division ability comprises: delay variation demand and minimum bandwidth requirement according to business calculate each service needed maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send; According to said each service needed that calculates maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send, the transmission cycle of said channel is divided into the said uplink stage of said downlink transfer stage and counterpart terminal time-division ability.
7. data transmission method according to claim 2; It is characterized in that; Saidly smart antenna is carried out wave beam adjustment comprise: the reception signal strength signal intensity indication that the record antenna is corresponding forms any several antennas according to said signal strength indication value the beam direction of said smart antenna; Through on the beam direction of said smart antenna, sending the packet of detection respectively with different speed, the beam direction that obtains said smart antenna corresponding validated user speed under different rates; The beam direction of said smart antenna is adjusted into the corresponding beam direction of maximum validated user speed.
8. data transmission method according to claim 2 is characterized in that, if comprise the said competitive stage, this method also comprises:
When the said downlink transfer stage begins, send the indication of mourning in silence with omnidirectional's mode of smart antenna, the value in territory is changed to corresponding duration of said downlink transfer stage duration of in this indication of mourning in silence.
9. according to the arbitrary described data transmission method of claim 2～8; It is characterized in that; This method also comprises: in said transmission cycle, according to the time that the occupancy or the data transmit-receive of channel in each stage that marks off are accomplished, adjust the length in each stage that marks off in the said transmission cycle.
10. data transmission method is applied to support the terminal of time-division it is characterized in that, comprising:
In the uplink assignment stage of using, smart antenna is carried out wave beam adjustment, directive sending upstream data at the terminal of the support time-division that marks off;
At the downlink transfer stage that marks off, downlink data receiving.
11. data transmission method according to claim 10 is characterized in that,
Saidly smart antenna is carried out wave beam adjustment directive sending upstream data comprise: according to each time slot and the corresponding relation at each terminal of the uplink assignment of obtaining in the stage; Confirm the corresponding up sending time slots in terminal of said support time-division; Smart antenna is carried out wave beam adjustment, send upstream data at said up sending time slots with the orientation direction of smart antenna.
12. according to claim 10 or 11 described data transmission methods, it is characterized in that,
This method further comprises: in the competitive stage that use at the terminal of not supporting the time-division that marks off, the first packet that carries the new business transmission demand is sent at the terminal of said support time-division with the mode of competitive channel.
13. data transmission method according to claim 11; It is characterized in that; Saidly smart antenna is carried out wave beam adjustment comprise: the reception signal strength signal intensity indication that the record antenna is corresponding forms any several antennas according to said signal strength indication value the beam direction of said smart antenna; Through on the beam direction of said smart antenna, sending the packet of detection respectively with different speed, the beam direction that obtains said smart antenna corresponding validated user speed under different rates; The beam direction of said smart antenna is adjusted into the corresponding beam direction of maximum validated user speed.
14. an access point apparatus comprises smart antenna, it is characterized in that, also comprises:
The up-downgoing stage is divided module, is used for the transmission cycle of channel is divided into the uplink stage of downlink transfer stage and counterpart terminal time-division ability;
Up receiving processing module was used in the uplink stage, and the terminal time-division ability corresponding according to the uplink stage receives upstream data;
Descending transmission processing module was used in the downlink transfer stage, and said smart antenna is carried out wave beam adjustment, directive sending downlink data.
15. access point apparatus according to claim 14 is characterized in that,
The said up-downgoing stage is divided the uplink assignment stage that module also is used for marking off in the said uplink stage terminal use of supporting the time-division; Then said up receiving processing module is in said uplink assignment in the stage; Said smart antenna is carried out the wave beam adjustment, so that said smart antenna receives upstream data with orientation direction.
16. access point apparatus according to claim 14 is characterized in that,
The said up-downgoing stage is divided the competitive stage that module also is used for marking off in the said uplink stage terminal use of not supporting the time-division; Then said up receiving processing module makes said smart antenna receive upstream data with omnidirectional's direction in the said competitive stage.
17. access point apparatus according to claim 15 is characterized in that,
The said up-downgoing stage divides module and is marking off said uplink assignment during the stage, also is used for marking off the broadcasting stage at said transmission cycle;
Said descending transmission processing module also was used in the said broadcasting stage, carried uplink assignment stage and downlink transfer each time slot and the corresponding relation at each terminal in the stage through broadcast frame;
Said up receiving processing module and said descending transmission processing module also are used for according to said corresponding relation each time slot in the said downlink transfer stage said smart antenna being carried out the wave beam adjustment respectively;
Said up receiving processing module also is used for according to said corresponding relation each time slot in the said uplink assignment stage said smart antenna being carried out the wave beam adjustment.
18. according to claim 15 or 16 described access point apparatus; It is characterized in that; The said up-downgoing stage is divided delay variation demand and minimum bandwidth requirement calculating each service needed maximum duration restriction that be scheduled for and the minimum duration restriction that must be scheduled send of module according to business; According to said each service needed that calculates maximum duration restriction that is scheduled for and the minimum duration restriction that must be scheduled and send, the transmission cycle of said channel is divided into the said uplink stage of said downlink transfer stage and counterpart terminal time-division ability.
19. access point apparatus according to claim 14; It is characterized in that; Said up receiving processing module and said descending transmission processing module also are used for respectively said smart antenna being carried out the wave beam adjustment; Comprise the reception signal strength signal intensity indication that the record antenna is corresponding, any several antennas are formed the beam direction of said smart antenna according to said signal strength indication value; Through on the beam direction of said smart antenna, sending the packet of detection respectively with different speed, the beam direction that obtains said smart antenna corresponding validated user speed under different rates; The beam direction of said smart antenna is adjusted into the corresponding beam direction of maximum validated user speed.
20. access point apparatus according to claim 14 is characterized in that, said equipment also comprises:
The Cycle Length adjusting module is used at said transmission cycle, according to the time that the occupancy or the data transmit-receive of channel in each stage that marks off are accomplished, adjusts the length in each stage that marks off in the said transmission cycle.
21. a terminal, the time-division is supported at this terminal, it is characterized in that, comprising:
Up transmission processing module is used in the uplink assignment stage of the terminal of the support time-division that marks off use smart antenna being carried out wave beam adjustment, directive sending upstream data;
Descending receiving processing module is used at the downlink transfer stage that marks off, downlink data receiving.
22. terminal according to claim 21 is characterized in that,
Said up transmission processing module; According to each time slot and the corresponding relation at each terminal of the uplink assignment of obtaining in the stage; Confirm the corresponding up sending time slots in terminal of said support time-division; Smart antenna is carried out wave beam adjustment, send upstream data at said up sending time slots with the orientation direction of smart antenna.
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